The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 25, 2016
Filed:
Aug. 14, 2014
Saint-gobain TM K.k., Tokyo, JP;
Toshimitsu Kuboki, Tokyo, JP;
Hiroshi Sugiyama, Tokyo, JP;
Yasuo Misu, Tokyo, JP;
Itaru Hashimoto, Tokyo, JP;
SAINT-GOBAIN TM K.K., Tokyo, JP;
Abstract
[Problems] To provide a high zirconia fused cast refractory that suffers less cracks in production and on heating, has excellent productivity, is hard to form zircon crystals with the refractory solely and under conditions where the refractory is in contact with molten glass, is hard to suffer cracks on receiving heat cycles in operation of a glass melting furnace, and has durability for a prolonged period of time. [Solution to Problems] A high zirconia fused cast refractory containing, as chemical components, from 85 to 95% by weight of ZrO, from 0.4 to 2.5% by weight of AlO, from 3.5 to 10% by weight of SiO, from 0.05 to 1% by weight in total of NaO and KO, more than 0.04% by weight and 1% by weight or less of BO, 0.02% by weight or less of PO, 0.05% by weight or less of MgO, from 0.01 to 0.2% by weight of CaO, in the case where any one of SrO and BaO is contained, from 0.3 to 3% by weight of SrO or more than 0.5% by weight and 3% by weight or less of BaO, and in the case where both of them are contained, 0.3% by weight or more of SrO and from 0.3 to 3% by weight in total of SrO and BaO, from 0.01 to 0.7% by weight of SnO, and 0.3% by weight or less in total of FeOand TiO.